Microtronix Access User Guide
10.3 WAN Port – Asynchronous / Serial Operation
The WAN port provides an RS232 (V.24) interface in a DB25F connector with standard DCE pin
configuration.
When configured for asynchronous / serial operation, the device names are ttyS0 (WAN port 0), and
ttyS1 (WAN port 1) on the 4002-Snn model.
The following table shows the RS232 pin configuration of the WAN port when configured for async.
10.3.1 Connecting to a DTE Device
The WAN port is configured as a DCE, so can normally connect to a DTE device using standard
straight through or 9 pin adapter cables.
10.3.1.1 Straight Through Cables
The table shows the pin configurations and connector types of the cables. The first column, DB25M, is
the end of the cable that connects to the WAN port. The other columns depict the connector and pin
configuration of the other end of the cables connecting to DTE device.
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Pin #
Direction
Signal Name
1
---
FG
2
input
TxD
3
output
RxD
4
input
RTS
5
output
CTS
6
output
DSR
7
---
SG
8
output
DCD
9
10
11
12
13
14
15
16
17
18
19
20
input
DTR
21
22
23
24
25